rustsec-2026-0158
Vulnerability from osv_rustsec
Published
2026-06-03 12:00
Modified
2026-06-04 11:56
Summary
Incomplete message edit validation in matrix-sdk-ui
Details

The message edit validation logic in the matrix-sdk-ui crate before 0.16.1 is missing a check: when replacing an encrypted event, the replacement event itself is not required to be encrypted. This enables a malicious homeserver administrator (or an actor with equivalent power) to impersonate or spoof messages as if they were sent by a victim user.

Severity
4.9 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "matrix-sdk-ui",
        "purl": "pkg:cargo/matrix-sdk-ui"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.16.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-h97m-27fx-42rx",
    "CVE-2026-45057"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The message edit validation logic in the matrix-sdk-ui crate before 0.16.1 is\nmissing a check: when replacing an encrypted event, the replacement event itself\nis not required to be encrypted. This enables a malicious homeserver\nadministrator (or an actor with equivalent power) to impersonate or spoof\nmessages as if they were sent by a victim user.",
  "id": "RUSTSEC-2026-0158",
  "modified": "2026-06-04T11:56:29Z",
  "published": "2026-06-03T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/matrix-sdk-ui"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0158.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-h97m-27fx-42rx"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Incomplete message edit validation in matrix-sdk-ui"
}


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